Robert McKimson: Robert McKimson. Director: Baggy Pants & the Nitwits. Robert McKimson was born on October 13, 1910. He started his career in animation, along with many others, as an artist for Walt Disney's Oswald the Rabbit in 1928. After Disney went to produce Mickey Mouse cartoons, Hugh Harman & Rudolph Ising went to Warner Brothers to direct and co-produce cartoon shorts, along with producer Leon Schlesinger. McKimson was one of the...